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Here we have the second prototype of the Moxibustor glitch oscillator synth. The first prototype had slightly different components, and reminded me of a dub siren in some modes. The second prototype has slightly different components and also a second IC.
What does the Moxibustor do really? It has three knobs and a buttons. Each knob controls the frequency of an astable Schmitt trigger oscillator. The frequency ranges have are different on purpose, so one of the oscillators can go down to down to sub-bass frequencies, and work as an LFO, and one can go up to 1 kHz or so.
The three signals are mixed digitally at the resolution of 1 bit. This clips the three square waves even more, which gives an effect called intermodulation distorsion, which slightly, but not completely, resembles ring modulation. Then there’s also a secondary chip, a decade counter (Just happened to have it lying around :p )
The result is a glitchy thing that offers a variety of glitchy square wave-ish sounds.